nO.1
Water Potential Notes
As pointed by D, on page 3, (c) pressure potential for plants only -
bullet number 3 - when a plant cell is in a solution with a higher (less negative) water potential, there is a net movement of water into the cell.
nO.2
Does nucleotide has one or three phosphate(s)?
It can be one, two or three, which also means that the term is non-specific.
To be specific, the raw material for DNA replication or transcription are deoxyribonucleoside triphosphates and ribonucleoside triphosphates.
Otherwise, we used the term free XXnucleotides very loosely.
You should know that nucleotide = nucleoside (pentose sugar + nitrogenous base) + phosphate grps
nO.3
Why are the dividing cells in tutorial so dark? Shouldn't there be only a dark spot known as nucleolus for cells in interphase?
Actually the diagram given wasn't so good. For cells in interphase, yes, you should be able to see the nucleolus quite well!:)
Cells in prophase are quite easily identified. I usually look for those in late prophase when you should be able to see individual chromosomes very well.
At interphase, you will not be able to see individual chromosomes.
One should note that mitosis is a continuous process so there are always intermediates stages.
PS: The chromosomes are usually stained so that one can see the them easily for the mitotic process.
http://www.vcbio.science.ru.nl/en/image-gallery/show/PL0096/labels/
http://www.microscopy-uk.org.uk/mag/artnov04macro/jronionroot.html
http://course1.winona.edu/sberg/IMAGES/anaphas.JPG
(for practice?)
Enzyme MCQs
LT test 2
D asked about using rate in length change to determine the rate of digestion. he pointed out that the change in length would decrease as the circle gets bigger.
I agreed. The method provided is a rather crude one (qn asked to estimate)
A better option is to use Area. In fact, we do have scripts that used area and we accepted it as well. =)
The Cat Is Out of the Bag
It finally jumped out, delivered in a mix-bag of sadness and relief.
Relief because it has been a weight on my mind for a while, unable to share and always trying to find the right moment. I wanted to let my R know during class camp but they were having such a good time that the moment never came. Then I realised perhaps there will never be a right moment.
Sadness because when it was out, it felt so real. I wasn't ready for it and wished I had more time instead of the short intermission to talk to R. But on hindsight, it was for the better before words get choked.
I am going to miss them more now after the class camp. Did they realise that they are a great bunch as one?
So the heart was a little squashed today.
Broke the news to all my classes. It is true. Saying farewell was not easy but at this age, I also know that it is not wise to leave your goodbye at the very end.
The only consolation is in knowing that even if I stay this year, I wouldn't be able to stay until the end of next year to witness their graduation.
Half-way through the day, I realised that being a teacher also means that even when you felt a little battered and wanted to sit down somewhere to contemplate, you still have to continue to ensure the smooth running of events for the students
---
I started the year tentatively,wary about getting too involved with the classes in case I do go off (after sending in my application in Jan) but it was difficult to keep that distance and not wanting to know them better. When the acceptance came as a surprise three wks ago, I wished that I could have done even more and better.
----
Coming to the end of the week.
Like any other time, we have to make the best out of what ever we have.
Relief because it has been a weight on my mind for a while, unable to share and always trying to find the right moment. I wanted to let my R know during class camp but they were having such a good time that the moment never came. Then I realised perhaps there will never be a right moment.
Sadness because when it was out, it felt so real. I wasn't ready for it and wished I had more time instead of the short intermission to talk to R. But on hindsight, it was for the better before words get choked.
I am going to miss them more now after the class camp. Did they realise that they are a great bunch as one?
So the heart was a little squashed today.
Broke the news to all my classes. It is true. Saying farewell was not easy but at this age, I also know that it is not wise to leave your goodbye at the very end.
The only consolation is in knowing that even if I stay this year, I wouldn't be able to stay until the end of next year to witness their graduation.
Half-way through the day, I realised that being a teacher also means that even when you felt a little battered and wanted to sit down somewhere to contemplate, you still have to continue to ensure the smooth running of events for the students
---
I started the year tentatively,wary about getting too involved with the classes in case I do go off (after sending in my application in Jan) but it was difficult to keep that distance and not wanting to know them better. When the acceptance came as a surprise three wks ago, I wished that I could have done even more and better.
----
Coming to the end of the week.
Like any other time, we have to make the best out of what ever we have.
Cell Structure and membrane MCQs
ROG - for test tmr, pls put down the mark you got from the last lecture test on the RH corner of your paper? I lost the data when I changed laptop. will remind again.
too Much
I got frustrated in class today. In retrospect, a big part of the frustration came from within me, in realising that we spent so much time marking and having meetings - one after another - that I had difficulty finding time to craft up better answers, to revisit and think through the questions again and to make learning worthwhile for the students each time I stepped into the classroom. With changes in the scheme of work and the attempts (or over-attempts) to do more things, I felt myself lagging behind. I don't mind staying up until 4 am to complete my markings but I asked myself, surely we can do better?
There was less time to deliberate and discuss in class and it was rushing tutorials from one to another (esp in time for test) that I panicked, worrying that the students did not know what I was talking about and that a lesson went to waste. I don't mind having the buzz in my class but I worried that students did not get what I was trying to say.
Then again, maybe I worried too much.
How much can I worry about them, I realised. I can only try my best to deliver and hope that they had picked up as much from me as possible - the skills and the content. How can I possibly dictate their learning?
(I must have said this before. If I did, it is a reminder to myself that I need to be objective about this)
I sometimes change the answers not because the answers were not accurate or good but I wanted something more comprehensive and wholesome that really brings out the essence of the topic, to show that one truly understands the topic and is able to relate to it.I wanted to tell a story. Often, we list a series of points to help us mark the scripts but a list of facts say nothing about one's level of understanding and I wanted to raise the bar for them. Hopefully.
I had aired my concerns to my bosses and hopefully we will have quality time with the students.
Another day. Time to start marking again.
There was less time to deliberate and discuss in class and it was rushing tutorials from one to another (esp in time for test) that I panicked, worrying that the students did not know what I was talking about and that a lesson went to waste. I don't mind having the buzz in my class but I worried that students did not get what I was trying to say.
Then again, maybe I worried too much.
How much can I worry about them, I realised. I can only try my best to deliver and hope that they had picked up as much from me as possible - the skills and the content. How can I possibly dictate their learning?
(I must have said this before. If I did, it is a reminder to myself that I need to be objective about this)
I sometimes change the answers not because the answers were not accurate or good but I wanted something more comprehensive and wholesome that really brings out the essence of the topic, to show that one truly understands the topic and is able to relate to it.I wanted to tell a story. Often, we list a series of points to help us mark the scripts but a list of facts say nothing about one's level of understanding and I wanted to raise the bar for them. Hopefully.
I had aired my concerns to my bosses and hopefully we will have quality time with the students.
Another day. Time to start marking again.
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